GB 8137-1987 Granular shellac

This standard is applicable to the control of the quality index of granular shellac. GB 8137-1987 Granular shellac GB8137-1987 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Seed lac
Seed lac-- Specification
This standard is applicable to the control of the quality index of seed lac. This standard is proposed with reference to the international standard ISO55-1977 "Seed lac". Definition
UDC 634. 0
.892.6
GB 8137 --- 87
Seed lac refers to the product processed from the original lac after crushing, screening, washing and drying. Technical requirements for raw materials used in processing shellac products
The indicators of granular shellac of various levels should meet the requirements of the following table: Index
Water content, %
Hot ethanol insoluble matter, %
Color index, No.
Water soluble matter, %
Wax, %
Ash, %
Particle size, mm
3 Packaging, transportation, storage
3.1 Packaging
Packed in gunny bags, lined with a layer of fine cotton cloth, each bag weighing 50~75kg. The gunny bags are printed with the words such as the manufacturer, product name, production date and sun-proof and moisture-proof. A certificate of inspection index must be placed in each bag. 3.2 Transportation
The product must be covered during transportation, and it is strictly forbidden to be exposed to the sun and rain, and placed away from heat sources and moisture. 3.3 Storage
Must be placed in a dry, ventilated and cool room, and need to be turned over frequently to avoid caking. 4 Product Inspection
The inspection of various technical indicators shall be carried out in accordance with GB8143-87 "Testing methods for shellac products". If one indicator fails to meet the requirements, it shall be regarded as a defective product of that grade.
Approved by the Ministry of Forestry of the People's Republic of China on November 12, 1987www.bzxz.net
Implementation on May 1, 1988
Additional instructions:
GB8137-87
This standard is under the jurisdiction of the Institute of Forest Chemical Industry, Chinese Academy of Forestry. This standard was drafted by the Institute of Forest Chemical Industry, Chinese Academy of Forestry. The main drafters of this standard are Wu Tongfang, Ma Wanqing and Wei Chaokuan. 120
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